vintagestory_backup.sh

#!/bin/bash

# Colors
RED="\e[0;91m"
GREEN="\e[0;92m"
YELLOW="\e[0;93m"
NC="\e[0m"

# CHANGE ME
saveDir="/home/USERNAME/.config/VintagestoryData/Saves"
backupDir="/PATH/TO/BACKUP/LOCATION/Vintage Story"
maxSaves=10

dateString=$(date +"%Y-%m-%d_%H-%M")

if [[ ! -d "$backupDir" ]]; then
    mkdir "$backupDir"
    if [[ ! -d "$backupDir" ]]; then
        echo "Error creating backup directory: $backupDir"
        exit 1
    fi
fi

cd "$saveDir" || exit 1

saves=(*.vcdbs)

for save in "${saves[@]}"; do
    if [[ ! "$save" =~ "_auto" && -f "$save" ]]; then
        save_size=$(ls -lh "$save" | awk '{print $5}')
        echo -n "Checking hash: ${save} (${save_size})"
        if [[ -f "${save}.md5sum" && ! "${save}" -nt "${save}.md5sum"  ]]; then
            echo " -- Found md5sum file"
            save_hash=$(cat "${save}.md5sum")
        else
            echo ""
            save_hash=$(md5sum "$save" | cut -d' ' -f1)
        fi
        echo "${save_hash}" > "${save}.md5sum"

        backup_file=$(ls "${backupDir}" | grep "${save}-" 2>/dev/null | grep -v md5sum | tail -n1)
        if [[ -n "$backup_file" ]]; then
            backup="${backupDir}/${backup_file}"
        else
            backup=""
        fi
        backup_hash=""

        if [[ -n "$backup" ]]; then
            save_size=$(ls -lh "$backup" | awk '{print $5}')
            echo -n "Checking hash: $(basename "${backup}") ($save_size)"
            if [[ -f "${backup}.md5sum" ]]; then
                echo " -- Found md5sum file"
                backup_hash=$(cat "${backup}.md5sum")
            else
                echo ""
                backup_hash=$(md5sum "$backup" | cut -d' ' -f1)
                echo "$backup_hash" > "${backup}.md5sum"
            fi
        fi

        #echo save: $save
        #echo backup: $backup
        #echo save_hash: $save_hash
        #echo backup_hash: $backup_hash

        if [[ "$backup_hash" == "$save_hash" ]]; then
            echo -e "${GREEN}$save matches latest backup, no backup needed${NC}"
        else
            echo "Copying file..."
            cp "$save" "${backupDir}/${save}-${dateString}"
            RET=$?
            if [[ $RET -eq 0 ]]; then
                echo -e "${YELLOW}Copied $save to ${backupDir}/${save}-${dateString}${NC}"
                echo "$save_hash" > "${backupDir}/${save}-${dateString}.md5sum"
            else
                echo -e "${RED}Error! cp returned $RET for $save${NC}"
            fi
        fi

        count=$(ls "${backupDir}" | grep -c "${save}-" | grep -v md5sum)
        if [[ $count -gt $maxSaves ]]; then
            let trim=($count - $maxSaves)
            if [[ $trim -gt 0 ]]; then
                echo "Cleaning up $trim old backups for $save"
                ls "${backupDir}" | grep "${save}-" | grep -v md5sum | head -n $trim | xargs -I SAVE /bin/rm -f "${backupDir}/SAVE" "${backupDir}/SAVE.md5sum"
            fi
        fi
    fi
done